Aqueous application systems for applying additives to polymeric particles, methods of preparing aqueous emulsions which include additives having a high melting point, additives having a low melting point and an emulsifiable wax. Also disclosed are methods of applying additives to polymeric particles and to polymeric particles treated by such methods.

Water-based compositions of the water-based wax emulsion type for protecting coating films are provided by emulsifying and dispersing, as essential components, [A] a disperse phase component and [B] an emulsifier component in water. The disperse phase component [A] is formed of (a) a petroleum fraction wax having a melting point of 50.degree.-90.degree. C., (b) an oxygen-containing wax having an oxygen content of at least 3.0 wt. % and a melting point of 50.degree.-85.degree. C., (c) an ethylene/.alpha.-olefin copolymer having a number average molecular weight of 2,000-20,000, and (d) a higher fatty acid metal salt and/or a metal-modified hard wax. The compositions can form, without the need for a solvent, strong barrier coats which are resistant to rain, moisture, sunlight and air pollutants even under severe environmental conditions. After these barrier coats are used, they can be easily removed with warm water containing a small amount of a solvent or steam.

The invention provides an aerosol spray reagent for the presumptive identification of cocaine, cocaine salts and phencyclidene comprising cobalt thiocyanate, a polyol, an aliphatic solvent, a nonionic emulsifier and a silicon antifoam agent, as well as providing a multi-reagent test kit for the presumptive identification of cocaine, cocaine salts and phencyclidene comprising a first aerosol spray reagent as defined and a second reagent which produces a color reaction in the presence of trace amounts of a diazotisable amine.

Aqueous wax dispersions (G) comprising (A) a wax mixture of (A.sub.1) at least one non-oxidized paraffin wax with needle penetration (according to ASTM-D 1321).ltoreq.20 dmm and melting range above 65.degree. C. and (A.sub.2) at least one oxidized hydrocarbon wax with needle penetration (according to ASTM-D 1321).ltoreq.4 dmm and optionally (A.sub.3) at least one non-oxidized paraffin wax with needle penetration (according to ASTM-D 1321).ltoreq.55 dmm and melting range below or up to 65.degree. C. and/or (A.sub.4) at least one cationically modified oxidized hydrocarbon wax and (B) a cationic dispersant system and optionally (C) at least one softening and/or antistatic adjuvant and/or (D) a preserving agent or/and a defoamer. and/or (E) at least one amphoteric surfactant, are eminently suitable as finishing agents, in particular for yarns, in order to provide good slippage properties to the yarns finished therewith.

Sheets or moulded bodies, for example particle board, are manufactured by hot pressing a lignocellulosic material in contact with an organic polyisocyanate and a wax release agent which is a vegetable wax, a modified vegetable oil, a microcrystalline wax or a mineral wax, said wax release agent having a melting point of at least 70.degree. C. Preferably the wax release agent is applied to the lignocellulosic material in the form of a dispersion in an aqueous emulsion of the polyisocyanate. The process facilitates the release of the sheets or moulded bodies from the caul plates or platens of the press.